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http://dx.doi.org/10.1016/j.ijnaoe.2015.09.003

Application of neuro-fuzzy algorithm to portable dynamic positioning control system for ships  

Fang, Ming-Chung (National Cheng Kung University)
Lee, Zi-Yi (National Cheng Kung University)
Publication Information
International Journal of Naval Architecture and Ocean Engineering / v.8, no.1, 2016 , pp. 38-52 More about this Journal
Abstract
This paper describes the nonlinear dynamic motion behavior of a ship equipped with a portable dynamic positioning (DP) control system, under external forces. The waves, current, wind, and drifting forces were considered in the calculations. A self-tuning controller based on a neuro-fuzzy algorithm was used to control the rotation speed of the outboard thrusters for the optimal adjustment of the ship position and heading and for path tracking. Time-domain simulations for ship motion with six degrees of freedom with the DP system were performed using the fourth-order RungeeKutta method. The results showed that the path and heading deviations were within acceptable ranges for the control method used. The portable DP system is a practical alternative for ships lacking professional DP facilities.
Keywords
Dynamic positioning; Pipe laying; Neuro-fuzzy; Short-crested waves;
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